Rainbow Electronics AT89LP216 - Manual (Page 87)

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3621A–MICRO–6/06
AT89LP216 [Preliminary]
Table of Contents
1. Description ............................................................................................... 1
2. Pin Configuration ..................................................................................... 2
2.1 AT89LP216: 16-lead PDIP/SOIC/TSSOP ..............................................................2
3. Pin Description ......................................................................................... 3
4. Block Diagram .......................................................................................... 4
5. Comparison to Standard 8051 ................................................................ 4
5.1 System Clock ..........................................................................................................4
5.2 Instruction Execution with Single-cycle Fetch .........................................................4
5.3 Interrupt Handling ...................................................................................................5
5.4 Timer/Counters .......................................................................................................5
5.5 Serial Port ...............................................................................................................5
5.6 Watchdog Timer .....................................................................................................5
5.7 I/O Ports .................................................................................................................. 5
5.8 Reset ......................................................................................................................6
6. Memory Organization .............................................................................. 6
6.1 Program Memory ....................................................................................................6
6.2 Data Memory ..........................................................................................................7
7. Special Function Registers ..................................................................... 8
8. Enhanced CPU ......................................................................................... 9
8.1 Restrictions on Certain Instructions ......................................................................10
9. System Clock ......................................................................................... 11
9.1 Crystal Oscillator ...................................................................................................11
9.2 External Clock Source ..........................................................................................11
9.3 Internal RC Oscillator ............................................................................................11
9.4 System Clock Out .................................................................................................11
10. Reset ....................................................................................................... 12
10.1 Power-on Reset ....................................................................................................12
10.2 Brown-out Reset ...................................................................................................14
10.3 External Reset ......................................................................................................14
10.4 Watchdog Reset ...................................................................................................15
10.5 Software Reset .....................................................................................................15
11. Power Saving Modes ............................................................................. 15
11.1 Idle Mode ..............................................................................................................15
11.2 Power-down Mode ................................................................................................15